Which Statement Is FALSE?
A) Collagen Is a Protein in Which

Multiple Choice

Which statement is FALSE?

A) Collagen is a protein in which the polypeptides are mainly in the $\alpha$ -helix conformation.
B) Disulfide linkages are important for keratin structure.
C) Gly residues are particularly abundant in collagen.
D) Silk fibroin is a protein in which the polypeptide is almost entirely in the $\beta$ conformation.
E) $\alpha$ -keratin is a protein in which the polypeptides are mainly in the $\alpha$ -helix conformation.